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frosja888 [35]
3 years ago
15

Solve the following system of equations

Mathematics
1 answer:
GrogVix [38]3 years ago
4 0

Answer:

Step-by-step explanation:

y = x - 5

2x - 5y = 1

2x - 5(x - 5) = 1

2x - 5x + 25 = 1

-3x + 25 = 1

-3x = -24

x = 8

y = 8 - 5

y = 3

(8, 3)

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Answer:

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Step-by-step explanation:

Growth can be represented by the equation A=A_01.02^{t}. We know that r=2% or 0.02 in this situation so we have 1.02. We know t=100 hours and the starting population A=200. We substitute these values and use a calculator to evaluate.

A=A_01.02^{t}\\A=200(1.02)^{100}

We now use our calculator to evaluate the exponent first and then multiply by 200.

A=200(7.2446)=1448.93


8 0
3 years ago
Need help............
taurus [48]

9514 1404 393

Answer:

  Perimeter: 17 inches

  Area: 8 square inches

Step-by-step explanation:

The ratio of perimeters is the same as the similarity ratio.

  JKLM perimeter / ABCD perimeter = P/68 = 1/4

Multiplying by 68, we get ...

  P = 68/4 = 17 . . . . inches

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The ratio of areas is the square of the similarity ratio.

  JKLM area / ABCD area = A/128 = (1/4)^2

Multiplying by 128, we get ...

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Perimeter = 17 inches

Area = 8 square inches

8 0
3 years ago
What is the value of
larisa [96]

Answer:

10.5

Step-by-step explanation:

5 0
3 years ago
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7 0
2 years ago
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The claim is that the proportion of drowning deaths of children attributable to beaches is more than 0.25, and the sample statis
Ainat [17]

Answer:

The test statistic Z = 3.125

Step-by-step explanation:

<em>Given Population proportion P = 0.25</em>

<em>Given sample size 'n' = 696</em>

<em>Sample proportion 'p⁻' = 0.30</em>

Test statistic

                 Z = \frac{p^{-}  -P}{\sqrt{\frac{P Q}{n} } }

                 Z = \frac{0.30-0.25}{\sqrt{\frac{0.25 X 0.75}{696} } }  = 3.125

<u><em>Final answer</em></u>:-

The test statistic Z = 3.125

3 0
3 years ago
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